Sorting problem
From: Paul JH Drake <p.drake at beatson.gla.ac.uk>
When I plot data as a boxplot, the boxes appear on the plot in alphabetical order (of group) rather than the order in which they appear in the data. So far, the only thing I can do to fix this is to prefix the group labels with a,b,c...etc to trick R into plotting them in the right order. Can sorting be turned off? How should I address this sensibly?
Actually they are shown in order of the levels of the factor. e.g. to show them in reverse order: attach(InsectSprays) spray <- factor( as.character(spray), level = rev(levels(spray)) ) boxplot(count ~ spray)